9.2.19 Relative Narrowband Tx Power (RNTP)
36.4233GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17TSX2 Application Protocol (X2AP)
This IE provides an indication on DL power restriction per PRB or per subframe per PRB (Enhanced RNTP) in a cell and other information needed by a neighbour eNB for interference aware scheduling.
|
IE/Group Name |
Presence |
Range |
IE type and reference |
Semantics description |
Criticality |
Assigned Criticality |
|
RNTP Per PRB |
M |
BIT STRING (6..110, …) |
Each position in the bitmap represents a nPRB value (i.e. first bit=PRB 0 and so on), for which the bit value represents RNTP (nPRB), defined in TS 36.213 [11]. Value 0 indicates "Tx not exceeding RNTP threshold". Value 1 indicates "no promise on the Tx power is given". The IE is ignored if the Enhanced RNTP IE is included. |
– |
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|
RNTP Threshold |
M |
ENUMERATED (-∞, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, …) |
RNTPthreshold is defined in TS 36.213 [11]. |
– |
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|
Number Of Cell-specific Antenna Ports |
M |
ENUMERATED (1, 2, 4, …) |
P (number of antenna ports for cell-specific reference signals) defined in TS 36.211 [10] |
– |
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|
P_B |
M |
INTEGER (0..3, …) |
PB is defined in TS 36.213 [11]. |
– |
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|
PDCCH Interference Impact |
M |
INTEGER (0..4, …) |
Measured by Predicted Number Of Occupied PDCCH OFDM Symbols (see TS 36.211 [10]). Value 0 means "no prediction is available". |
– |
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|
Enhanced RNTP |
O |
YES |
ignore |
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>Enhanced RNTP Bitmap |
M |
BIT STRING (12..8800, …) |
Each position in the bitmap represents a PRB in a subframe; value "00" indicates "Tx not exceeding RNTP Threshold", value "01" indicates "Tx not exceeding RNTP High Power Threshold", value "11" indicates that "no promise on the Tx power is given". Value "10" is ignored by the receiver". Each position is applicable only in positions corresponding to DL subframes. The first 2 bits correspond to PRB 0 of the first subframe for which the IE is valid, the following 2 bits correspond to PRB 1 of the first subframe for which the IE is valid, and so on. The bit string may span across multiple contiguous subframes (maximum 40). The length of the bit string is an integer multiple of The Enhanced RNTP pattern is continuously repeated. |
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>RNTP High Power Threshold |
M |
ENUMERATED (-∞, -11, -10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, …) |
Defined as the RNTPthreshold in TS 36.213 [11]. |
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>Enhanced RNTP Start Time |
0..1 |
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>>Start SFN |
M |
INTEGER (0..1023, …) |
SFN of the radio frame containing the first subframe when the Enhanced RNTP IE is valid. |
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>>Start Subframe Number |
M |
INTEGER (0..9, …) |
Subframe number, within the radio frame indicated by the Start SFN IE, of the first subframe when the Enhanced RNTP IE is valid. |
. 
is defined in TS 36.211 [10].